Jun Ware Porcelain originated from celadon porcelain. The Chinese have known how to produce crude celadon porcelain since as early as Shang (1600-1046 B.C.) and Chou (1045-256 B.C.) Dynasties, when slavery still existed. Advancing into the Tang dynasty (618-907 A.D.), potters applied chemical compositions including manganese and titanium to restore the blue coloring in the background of white, which is known as “Tang Jun.” Although not abundant in quantities, this period can be marked as the sprouting time for Chinese multi-color glazed porcelain.
Knowledgeable of this type of technique, potters in Sung Dynasty (960-1279 A.D.) added the element of red copper and utilized the atmosphere in kilns to restore copper oxide. As a result of combining colloid copper scattered in celadon glaze, iron oxides and compounds of phosphoric and silicic acids, a milky and more fluid blend was formed. Along with reasons such as uneven temperature in the ceiling, floor, front, and back of ancient half-way slanted kilns, the blend couldn’t burn completely to become pure, restored copper.Therefore, different color variations in red, yellow, green, purple, greenish blue, navy blue and even moonlight white appeared in different directions and unpredictable patterns. This was the copper red and kiln related change of glazing. Depending on the unique percentage of each above-mentioned color, the mixture effects came to shades like rosy red, flowering-quince red, oxblood red, eel red, moonlight white, sky blue and other unexpected color tones. This is the intrinsic distinctiveness of Jun Ware Porcelain.
By: Tea Master Mancsi
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